/*
 * The MIT License (MIT)
 *
 * Copyright (C) 2019, CosmicMind, Inc. <http://cosmicmind.com>.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

internal protocol Probable {
  associatedtype ProbableElement: Equatable
  
  /**
   The instance count of elements.
   - Parameter of elements: A list of ProbableElements
   - Returns:	An Int.
   */
  func count(of elements: ProbableElement...) -> Int
  
  /**
   The instance count of elements.
   - Parameter of elements: An Array of ProbableElements.
   - Returns:	An Int.
   */
  func count(of elements: [ProbableElement]) -> Int
  
  /**
   The probability of given elements.
   - Parameter of elements: A list of ProbableElements.
   - Returns:	A Double.
   */
  func probability(of elements: ProbableElement...) -> Double
  
  /**
   The probability of given elements.
   - Parameter of elements: An Array of ProbableElements.
   - Returns:	A Double.
   */
  func probability(of elements: [ProbableElement]) -> Double
  
  /**
   The expected value of given elements based on a number of trials.
   - Parameter trials: An Int.
   - Parameter for elements: A list of ProbableElements.
   - Returns: A Double.
   */
  func expectedValue(trials: Int, for elements: ProbableElement...) -> Double
  
  /**
   The expected value of given elements based on a number of trials.
   - Parameter trials: An Int.
   - Parameter for elements: An Array of ProbableElements.
   - Returns: A Double.
   */
  func expectedValue(trials: Int, for elements: [ProbableElement]) -> Double
}
